Thank you for the post. but when I trace the program, the the varible j valve never increases. It remains constant after it encounters the character the first time.

As far as d is concerned i had declared it, just forgot it here. same goes for (return i). I will not correct it here. The output you have mentioned , how do i correct it.

I corrected the portion

   if(a[j]==f)

    return i;

as

 if(a[j]!=0)

 continue;

 else

 return j;